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1 EESTI STANDARD EVS-EN :2003 Power transformer and reactor fittings - Part 3: Protective relay for hermetically sealed liquid-immersed transformers and reactors without gaseous cushion Power transformer and reactor fittings - Part 3: Protective relay for hermetically sealed liquidimmersed transformers and reactors without gaseous cushion EESTI STANDARDIKESKUS

2 EESTI STANDARDI EESSÕNA NATIONAL FOREWORD Käesolev Eesti standard EVS-EN :2003 sisaldab Euroopa standardi EN :2002 ingliskeelset teksti. Käesolev dokument on jõustatud ja selle kohta on avaldatud teade Eesti standardiorganisatsiooni ametlikus väljaandes. Standard on kättesaadav Eesti standardiorganisatsioonist. This Estonian standard EVS-EN :2003 consists of the English text of the European standard EN :2002. This document is endorsed on with the notification being published in the official publication of the Estonian national standardisation organisation. The standard is available from Estonian standardisation organisation. Käsitlusala: EN applies to protective relays for hermetically liquid-immersed transformers, complying with the EN series, and reactors, complying with EN 60289, without gaseous cushions for indoor or outdoor installation. Scope: EN applies to protective relays for hermetically liquid-immersed transformers, complying with the EN series, and reactors, complying with EN 60289, without gaseous cushions for indoor or outdoor installation. ICS Võtmesõnad: accessories, chokes (electric), electric coils, electric relays, electrical engineering, electrically- operated devices, electrically-opera, inductors, power transformers, protective relays, relays, specification (approval), specifications, testing, transformers Standardite reprodutseerimis- ja levitamisõigus kuulub Eesti Standardikeskusele

3 EUROPEAN STANDARD EN NORME EUROPÉENNE EUROPÄISCHE NORM January 2002 ICS English version Power transformer and reactor fittings Part 3: Protective relay for hermetically sealed liquid-immersed transformers and reactors without gaseous cushion Accessoires pour transformateurs de puissance et bobines d'inductance Partie 3: Relais de protection pour transformateurs et bobines d'inductance hermétiques immergés dans un liquide et sans matelas gazeux Zubehör für Transformatoren und Drosselspulen Teil 3: Schutzrelais für ohne Gaspolster hermetisch verschlossene flüssigkeitsgefüllte Transformatoren und Drosselspulen This European Standard was approved by CENELEC on CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN :2002 E

4 EN : Foreword This European Standard was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN on The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) latest date by which the national standards conflicting with the EN have to be withdrawn (dow) EN is to be read in conjunction with EN

5 3 EN :2002 Contents Page 1 Scope Normative references Identification of relays Service conditions Maximum inclination Operating pressure Sensitivity of the relay contacts to magnetic fields Outline and mounting details Operational performance General Gas collection Leakage detection Pressure detection Temperature detection (for relay type 2) Temperature indicator Electrical characteristics of switch Rated currents Breaking and making capacity Operation time Mechanical requirements Terminal box Testing facilities Gas sampling Presence of gas in the relay Nameplate Tests Routine tests Type tests...8

6 EN : Scope EN applies to protective relays for hermetically liquid-immersed transformers, complying with the EN series, and reactors, complying with EN 60289, without gaseous cushions for indoor or outdoor installation. This part of EN defines the operating limits, outline and mounting details, operational performance, electrical characteristics, dynamic characteristics. Should environmental conditions and dynamic stress requirements differ from those detailed in clause 3 of EN , EN may then be applied by agreement between purchaser and supplier for those parts which are not affected by such abnormal installation conditions. NOTE EN may be used as far as applicable for relays with mercury switches. Restrictions on the use of mercury devices may be imposed by national regulations. 2 Normative references Addition to EN : EN Low-voltage switchgear and controlgear for industrial use - Terminal marking and distinctive number - General rules EN Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code) EN series Power transformers (IEC series) EN Reactors (IEC 60289:1988, mod.) EN A Low-voltage switchgear and controlgear - Part 5-1: Control circuits devices and switching elements - Electromechanical control circuit devices (IEC :1997) 3 Identification of relays Two types are identified in EN which shall meet the following functions: Table 1 Identification of relays Function Relay type 1 Relay type 2 Gas and leakage detection 1 contact 1 contact Overpressure detection 1 contact 1 contact Over temperature detection 2 contacts (alarm/tripping) Temperature indicator Yes Yes Visual leakage control Yes Yes NOTE The two functions gas and leakage detection are usually actuated by one contact in common.

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